The webserver I am using is IIS 7.5 running on Win Server 2008 - with an SSL cert from Verisign.

I have not been able to get this to work - so I then tried running the SmartFTP client against the 'SmartFTP - FTPS' site - which I assume is for testing / demo purposes (Favourites -> SmartFTP FTPS) - but I get an error for that also: